 Database table

 Data model view

 Projection view

 Service definition

 Service binding

In RAP, the development flow follows a bottom-up approach, beginning with persistence and ending with OData exposure:

Database table:The persistence layer where data is stored. This is the foundation of the business object model.

Data model view (CDS entity):The CDS view is defined on top of the database table to provide a semantic data model. It represents entities like Travel or Booking.

Projection view:Provides an abstraction of the data model view and controls which fields and associations are exposed externally.

Service definition:Specifies which projection views (entities) are exposed in the OData service.

Service binding:Connects the service definition to a communication protocol (e.g., OData V2 or V4), generating the final consumable service endpoint.

This sequence ensures a layered architecture consistent with RAP guidelines:

Persistence layer → Data model layer → Projection layer → Service layer → Binding to protocol.